Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica
Variations in properties controlling ice flow (e.g., topography, accumulation rate, basal friction) are recorded by structures in glacial stratigraphy. When anomalies that disturb the stratigraphy are fixed in space, the structures they produce advect away from the source and can be used to trace fl...
Published in: | The Cryosphere |
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Copernicus Publications
2018
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Online Access: | https://doi.org/10.5194/tc-12-2821-2018 https://www.the-cryosphere.net/12/2821/2018/tc-12-2821-2018.pdf https://doaj.org/article/6dbcc7c1f90c4d4f8e59ae779fd54739 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6dbcc7c1f90c4d4f8e59ae779fd54739 2023-05-15T14:03:53+02:00 Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica N. Holschuh K. Christianson H. Conway R. W. Jacobel B. C. Welch 2018-09-01 https://doi.org/10.5194/tc-12-2821-2018 https://www.the-cryosphere.net/12/2821/2018/tc-12-2821-2018.pdf https://doaj.org/article/6dbcc7c1f90c4d4f8e59ae779fd54739 en eng Copernicus Publications doi:10.5194/tc-12-2821-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/2821/2018/tc-12-2821-2018.pdf https://doaj.org/article/6dbcc7c1f90c4d4f8e59ae779fd54739 undefined The Cryosphere, Vol 12, Pp 2821-2829 (2018) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/tc-12-2821-2018 2023-01-22T17:53:07Z Variations in properties controlling ice flow (e.g., topography, accumulation rate, basal friction) are recorded by structures in glacial stratigraphy. When anomalies that disturb the stratigraphy are fixed in space, the structures they produce advect away from the source and can be used to trace flow pathways and reconstruct ice-flow patterns of the past. Here we provide an example of one of these persistent tracers: a prominent unconformity in the glacial layering that originates at Mt. Resnik, part of a subglacial volcanic complex near Kamb Ice Stream in central West Antarctica. The unconformity records a change in the regional thinning behavior seemingly coincident ( ∼ 3440±117 a) with stabilization of grounding-line retreat in the Ross Sea Embayment. We argue that this feature records both the flow and thinning history far upstream of the Ross Sea grounding line, indicating a limited influence of observed ice-stream stagnation cycles on large-scale ice-sheet routing over the last ∼ 5700 years. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Kamb Ice Stream Ross Sea The Cryosphere West Antarctica Unknown Kamb Ice Stream ENVELOPE(-145.000,-145.000,-82.250,-82.250) Ross Sea West Antarctica The Cryosphere 12 9 2821 2829 |
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Open Polar |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir N. Holschuh K. Christianson H. Conway R. W. Jacobel B. C. Welch Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
topic_facet |
geo envir |
description |
Variations in properties controlling ice flow (e.g., topography, accumulation rate, basal friction) are recorded by structures in glacial stratigraphy. When anomalies that disturb the stratigraphy are fixed in space, the structures they produce advect away from the source and can be used to trace flow pathways and reconstruct ice-flow patterns of the past. Here we provide an example of one of these persistent tracers: a prominent unconformity in the glacial layering that originates at Mt. Resnik, part of a subglacial volcanic complex near Kamb Ice Stream in central West Antarctica. The unconformity records a change in the regional thinning behavior seemingly coincident ( ∼ 3440±117 a) with stabilization of grounding-line retreat in the Ross Sea Embayment. We argue that this feature records both the flow and thinning history far upstream of the Ross Sea grounding line, indicating a limited influence of observed ice-stream stagnation cycles on large-scale ice-sheet routing over the last ∼ 5700 years. |
format |
Article in Journal/Newspaper |
author |
N. Holschuh K. Christianson H. Conway R. W. Jacobel B. C. Welch |
author_facet |
N. Holschuh K. Christianson H. Conway R. W. Jacobel B. C. Welch |
author_sort |
N. Holschuh |
title |
Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
title_short |
Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
title_full |
Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
title_fullStr |
Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
title_full_unstemmed |
Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica |
title_sort |
persistent tracers of historic ice flow in glacial stratigraphy near kamb ice stream, west antarctica |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-2821-2018 https://www.the-cryosphere.net/12/2821/2018/tc-12-2821-2018.pdf https://doaj.org/article/6dbcc7c1f90c4d4f8e59ae779fd54739 |
long_lat |
ENVELOPE(-145.000,-145.000,-82.250,-82.250) |
geographic |
Kamb Ice Stream Ross Sea West Antarctica |
geographic_facet |
Kamb Ice Stream Ross Sea West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Kamb Ice Stream Ross Sea The Cryosphere West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Kamb Ice Stream Ross Sea The Cryosphere West Antarctica |
op_source |
The Cryosphere, Vol 12, Pp 2821-2829 (2018) |
op_relation |
doi:10.5194/tc-12-2821-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/2821/2018/tc-12-2821-2018.pdf https://doaj.org/article/6dbcc7c1f90c4d4f8e59ae779fd54739 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-12-2821-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
9 |
container_start_page |
2821 |
op_container_end_page |
2829 |
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1766274736158932992 |